MCQOPTIONS
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MCQOPTIONS
This section includes 25 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The formation of odd electron molecules such as H2+, NO, O3 is also explained in VBT. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Which orbital would form a more stronger bond if both of them have identical stability? |
| A. | The one which is less directionally concentrated |
| B. | The one which is more directionally concentrated |
| C. | Both will be equally strong |
| D. | It differs from atom to atom |
| Answer» C. Both will be equally strong | |
| 3. |
According to VBT, the direction of a bond which is formed due to overlapping will be _____________ |
| A. | In the same direction in which orbitals are concentrated |
| B. | In the opposite direction in which orbitals are concentrated |
| C. | Perpendicular to the direction in which orbitals are concentrated |
| D. | None of the mentioned |
| Answer» B. In the opposite direction in which orbitals are concentrated | |
| 4. |
The p-orbital is in the shape of a _____________ |
| A. | Sphere |
| B. | Dumbbell |
| C. | Pear-shaped lobe |
| D. | None of the mentioned |
| Answer» C. Pear-shaped lobe | |
| 5. |
The s-orbital does not show preference to any direction because _____________ |
| A. | It is the smallest orbital |
| B. | It is present in every atom |
| C. | It is spherically symmetric |
| D. | It is the first orbital |
| Answer» D. It is the first orbital | |
| 6. |
According to VBT, the formation of a stable bond requires _____________ |
| A. | The electrons should have opposite spins |
| B. | The two atoms should be close to each other |
| C. | The greater overlapping of the electron clouds |
| D. | All of the mentioned |
| Answer» E. | |
| 7. |
Valence Bond Theory was developed in the year? |
| A. | 1916 |
| B. | 1927 |
| C. | 1930 |
| D. | 1932 |
| Answer» C. 1930 | |
| 8. |
Which of the following is not a homonuclear diatomic molecule? |
| A. | H2 |
| B. | N2 |
| C. | O2 |
| D. | HCl |
| Answer» E. | |
| 9. |
Valence bond theory explains the overlapping of atomic orbitals. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
A positive overlap is same as ________ |
| A. | out-phase overlap |
| B. | negative overlap |
| C. | zero overlap |
| D. | in-phase overlap |
| Answer» E. | |
| 11. |
A __________ overlap doesn’t result in the formation of a bond. |
| A. | positive |
| B. | negative |
| C. | zero |
| D. | rational |
| Answer» D. rational | |
| 12. |
A pi bond is stronger than a sigma bond. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
The pi-bond involves __________ |
| A. | axial overlapping |
| B. | side-wise overlapping |
| C. | end to end type of overlapping |
| D. | head-on overlapping |
| Answer» C. end to end type of overlapping | |
| 14. |
Which type of bond is present between hydrogens in hydrogen molecule? |
| A. | Sigma bond |
| B. | Pi bond |
| C. | Ionic bond |
| D. | Metallic bond |
| Answer» B. Pi bond | |
| 15. |
What is the electronic configuration of carbon in it’s excited state? |
| A. | 1s22s22p4 |
| B. | 1s22s22p3 |
| C. | 1s22s22p5 |
| D. | 1s22s12p4 |
| Answer» C. 1s22s22p5 | |
| 16. |
The strength of covalent ___________ extent of overlapping of orbitals. |
| A. | may be or may not be related |
| B. | is independent on |
| C. | is dependent on |
| D. | is not related to |
| Answer» D. is not related to | |
| 17. |
The bond enthalpy of ___________ molecule is 435.8 kJ mol-1. |
| A. | Hydrogen |
| B. | Oxygen |
| C. | Nitrogen |
| D. | Helium |
| Answer» B. Oxygen | |
| 18. |
The formation of odd electron molecules such as H2+, NO, O3 is also explained in VBT? |
| A. | True |
| B. | False |
| Answer» C. | |
| 19. |
Which orbital would form more stronger bond if both of them have identical stability? |
| A. | The one which is less directionally concentrated |
| B. | The one which is more directionally concentrated |
| C. | Both will be equally strong |
| D. | It differs from atom to atom |
| Answer» C. Both will be equally strong | |
| 20. |
According to VBT, the direction of a bond which is formed due to overlapping will be |
| A. | In the same direction in which orbitals are concentrated |
| B. | In the opposite direction in which orbitals are concentrated |
| C. | Perpendicular to the direction in which orbitals are concentrated |
| D. | None of the mentioned |
| Answer» B. In the opposite direction in which orbitals are concentrated | |
| 21. |
The Valence Bond Theory does not explain the paramagnetic nature of oxygen molecule. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 22. |
The p-orbital is in the shape of a |
| A. | Sphere |
| B. | Dumbbell |
| C. | Pear-shaped lobe |
| D. | None of the mentioned |
| Answer» C. Pear-shaped lobe | |
| 23. |
The s-orbital does not show preference to any direction because |
| A. | It is the smallest orbital |
| B. | It is present in every atom |
| C. | It is spherically symmetric |
| D. | It is the first orbital |
| Answer» D. It is the first orbital | |
| 24. |
According to VBT, the formation of a stable bond requires |
| A. | The electrons should have opposite spins |
| B. | The two atoms should be close to each other |
| C. | The greater overlapping of the electron clouds |
| D. | All of the mentioned |
| Answer» E. | |
| 25. |
Valence Bond Theory was developed in the year |
| A. | 1916 |
| B. | 1927 |
| C. | 1930 |
| D. | 1932 |
| Answer» C. 1930 | |